Carburetor



May 28, 1935.

E. s. ALMARAZ E1 AL. 2,@02 928 CARBURETOR 3 Sheets-Sheet 1 Filed Nov. 18, 1932 INVENTORS ATTORNEY May 28, 1935.. E. s. ALMARAZ ET AL' 2,902,923

CARBURETOR Filed Nov. 18, 1932 s Sheets-Sheet 3 INVENTORS BY d.

ATTORNEY Patented May 28, 1935 CARBURETOR Edward Susanna Almaraz, Madrid, and Edmond Cabezas San Antonio, Guadalajara, Spain Application November 18, 1932, Serial No. 643,204

. In Spain November 21, 1931 3 Claims.

It is known that the aspiration produced bya gas engine'varies according to'the numbenof' revolutions, and that, for a'given variation in the aspiration, the amount of .air and-fuel used obey diiferent laws which have usually made-it necessary to employ a compensation spraying nozzle, additional entries of air, etc; f

The carburetor we present does away with all complication and is based on an absolutely new principle: It obtains all the variations in the consumption of air and fuel with only one spraying nozzle, by means of the installation of a delivery space (diffuser) of variable section and profile.

The variation of section of thedelivery space 1 is obtained at the same time that the entry of the mixture to the engine is varied; that is to say, the delivery space and the throttle valve are now operated from a single control, whereby a mixture of constant composition is obtained from the slow operation to the fastest operation.

The delivery space has,'besides, an independent control in order that the starting position in each case may be set, with the delivery space more or less choked, which is equivalent to having the mixture richer or poorer for all operating speeds within each initial position of the delivery space; It is thus made possiblefor the driver to have at his reach a means to correct, at will, the richness of the mixture and that, once the proper composition is selected, the latter will be conserved for all speeds. For the starting operation the delivery space is closed and a very rich mixture is obtained which facilitates the starting operation.

It is possible to obtain aproper operation of the motor both in summer and winter, and regardless of whether the weather is dry or damp. In aviation service, it permits flight at different heights without need of any special corrector, since the correction of' the mixture is obtained with the initial position of the delivery space.

The special spraying nozzle for slow speed is eliminated because when the throttle valve situated at the entrance of the mixture is closed, the choking of the delivery space is just suflicient to insure the aspiration of the fuel in the only spraying nozzle, no matter how slow the speed is. Due to this arrangement the feeding of the fuel is centered in the case of high speeds as well as in the case of low speeds.

The invention will appear more clearly from the following description when taken with the accompanying drawings showing a preferred embodiment of the inventive idea:

In the drawings:

Figure 1 shows in side elevation a carburetor embodying the principles of the present invention. Figure 2 is a front elevation of the carburetor shown in Figure 1.

Figure3 is a horizontal section through the. carburetorshown'in Figurel.

Figure 4 shows the variable diifusor on alarger scale. a

Figure 5 is a vertical section through the carburetor shown in Figure 1 l Figures 6,7 and Bshow. diagrammatically three different positions of'the diifusor and the throttle valve.

Figure 9 is a transverse sectional view of the .expansible space or throttle portion of the device.

The carburetor shown in the drawings comprises a float chamber. The carburetor is composed of z A float cham ber A (Figs.;1 and 3) joined to the body (Cl); this chamber communicates with the lower part of the single sprayingnozzle B, which'is located inside the expansible delivery space X, above thedelivery valve C. H V,

[The delivery space is composed of a series of flexible laminations (Figs. 3 and 4) of suitable material and. fastened by welding, imbedding,

articulation or any other means, to. two rings I and 2 in such a mannerthat one overlapsthe other. Ring 2 isfixedfor each initial position, thatis, .foreach composition of.,mixture; and ring I receives the translation movement in the direction of the delivery space shaft by means of cam 5 and shaft G (Fig.1) when control E is operated which at the same time opens and closes and throttle valve.

The control of ring I can be effected likewise by making it turn around its shaft.

The control F for correcting the mixture (Figs.

1, 2, 3 and 5), changes the initial position of the ring 2 and is operated by thedriver when he desires to change the composition of the mixture.

The controlor controlling means F consist of a curved lever ll which is hinged at both its ends I2 (Fig. 5) to the carburetor casing and carries pins l3 passing through slots M of the. casing and engaging the lower ring 2. If the lever H is turned, the position of the ring! will be adjusted soas to alter the composition of the mixture.

Figures 6, 7 and 8 show three different positions for a mixture.

What is claimed is:

1. A carburetor, comprising in combination, a casing having tubular side walls, a diifusor within said casing, said difiusor consisting of a number'of elongated flexible blades forming a tube having a variable. cross-section and shape; a movable ring connected with adjacent ends of all of said blades, another movable ring connected with the opposite ends of all of said blades, a throttle valve disc within'said casing, a valve stem carrying said disc andrrotatably mounted in said casing, a shaft connected with the first mentioned ring and projecting through a slot,

- tioned ring and projecting through a slot formed in said casing, and another lever rotatably mounted outside 'of saidcasing in a side wall thereof and adapted to 'move the second-mentioned shaft toadjust the position of the secondmentioned ring relatively to the first-mentioned ring. I 1

2. A carburetor, comprising in combination, a casing having )tubular side walls, a'diffusor within said casingsaid diilusor consisting of a number of elongatedfiexible blades forming a tube having a variable cross-section and shape; a movable ring connected with adjacent ends of all of said blades, another movable ring connected with the opposite ends of all'rof said blades,

a throttle valve'disc within said' casing, a valve stem carrying said disc'and rotatably mounted in saidcasing, a shaft connected with the first mentioned ring and projecting through a slot formed in said casing, a cam situated outside of said casing and firmly connected with said stem, said cam being in contact with said shaft, a lever firmly connected with said shaft and said cam, said lever being situated outside of said casing and being adapted to adjust simultaneously the'position of said throttle valve relatively to said casing and the position of the firstmentioned ring relatively to the second-mentioned ring, a movement of the first-mentioned ring toward the second-mentioned ring causing a bending of said flexible blades, whereby a Venturi tube is formed, another shaft connected with the second-mentioned ring and projecting through a slot formed in said casing, and means mounted outside of said casing adapted to move the second-mentioned shaft to adjust the position of the second-mentioned ring relatively to the first-mentioned ring.

3. A carburetor, comprising in combination, a casing having tubular side walls, a difiusor Within said casing, said diifusor consisting of a number of elongated flexible blades forming a tube having a variable cross-section and shape; a movable ring connected with adjacent ends of all of said blades, another movable ring connected with the opposite ends of all of said blades, a throttle valve disc within said casing, a valve stem carrying said disc and rotatably mounted in said casing, a'shaft connected with the first 'mentioned ring and projectingthrough a slot formed in. said easing a cam situated outside of said casing and firmly connected with said stem, said cam being incontact'with said shaft, a lever firmly connected with said shaft and said cam, said lever being situated outside of said casing and being adapted to adjust simultaneously the, position of said throttle valve relatively to said casing and the position of the flrstmentioned ring relatively to the second-mentioned ring, a movementof the first-mentioned ring toward the second-mentioned ring causing a bending of said flexible blades, whereby a Venturi tube is formed, another shaft connected with the second-mentioned ring and projecting through a slot formed in said casing, and means mounted, outside of said casing adapted to move the second-mentioned shaft to adjust the position of the second-mentioned ring relatively to the'first-mentioned ring, said flexible blades, being so formed as to overlap throughout bending of said flexible blades to vary said cross section inshape, said cross section formed by said flexible blades being substantially circular, at any point.

EDWARD SUSANNA ALMARAZ.

EDMOND'CABEZAS SAN ANTONIO 

